1563564013 has 4 divisors (see below), whose sum is σ = 1705706208. Its totient is φ = 1421421820.

The previous prime is 1563563977. The next prime is 1563564031. The reversal of 1563564013 is 3104653651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3104653651 = 11 ⋅282241241.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1563564013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1563564013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1563564113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71071081 + ... + 71071102.

It is an arithmetic number, because the mean of its divisors is an integer number (426426552).

Almost surely, 2^1563564013 is an apocalyptic number.

It is an amenable number.

1563564013 is a deficient number, since it is larger than the sum of its proper divisors (142142195).

1563564013 is a wasteful number, since it uses less digits than its factorization.

1563564013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142142194.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 1563564013 is about 39541.9272797875. The cubic root of 1563564013 is about 1160.6605465498.

The spelling of 1563564013 in words is "one billion, five hundred sixty-three million, five hundred sixty-four thousand, thirteen".